Prime Minister Keir Starmer’s official spokesman described the allegation Thursday as “incredibly concerning.”
In response to reports of MPs leaving their drinks at the bar while going to vote, the No. 10 spokesman added: “It’s clearly the case that that’s not sensible. But the PM will let people follow their own common sense on this.”
The Met Police confirmed they were investigating in a statement Wednesday, adding: “The victim is being supported by officers. There have been no arrests at this stage.”
The police service has encouraged anyone who believes they have been a victim or witness to spiking to contact them.
Parliamentary authorities have stressed that they are taking the incident extremely seriously, and trade unions representing people working on the parliamentary estate have said the report raises fresh questions about safety.
A group of Labour MPs recently called for restrictions on the sale of alcohol on the parliamentary estate as part of a drive to modernize the working culture of the House of Commons.
Emilio Casalicchio contributed to this report.
